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In this paper, an off-design performance prediction model for a single shaft industrial gas turbine (IGT) using Microsoft Excel with Visual Basic for Applications (VBA) programming is presented. The modelling architecture is comprised of fundamental thermodynamic equations describing the performance of IGTs. A graphical user interface has been constructed to allow an easy interaction of the model...
This paper is focused on the usage of the organic Rankine cycles in the current and the new proposed electric power plants. Firstly, the current situation of the usage of these cycles is mentioned. In the next part, the motivation of the utilization, advantages and disadvantages of these cycles are described. Then these cycles are divided by the different working fluids. Further, the modeling of the...
The aim of this work is thermodynamic analysis of the combine of concentrated solar power plant CSP and multi-effect desalination (MED) compared with the combination of CSP with a reverse osmosis (RO) plant. The solar power plants disposed a solar tour (heliostat field and volumetric receiver and steam turbine for electric production. The performance of the solar plant and the desalination plant both...
The thermodynamic efficiency of typical conventional and nuclear power plants is insufficient. A large amount of the generated heat is removed to the environment and regarded as a waste. A solution which is commonly used to increase the efficiency and profitability of the existing and planned power plants refers to cogeneration of heat and power. To prepare sophisticated thermodynamic and economic...
In the present study, the most important parameters that affect the performance of a solar chimney power plant are investigated. The plant has a collector area of 7000 m diameter and a tower of 1000 m height. Under certain weather conditions, the results obtained show that the maximum electrical power of this plant can be reached in June and can be up to 119 MW. This amount of electrical power, which...
This work presents a study on the influence of the main operating variables on the gas turbine cycle. A numerical simulation of a gas turbine cycle is performed for a net power of 100 MW. A calculation code is developed using EES software. The operating variables for values usually adopted for the various designs of gas turbine cycles. The optimal values of the process variables are defined. We obtain...
Regeneration is a technique used to improve thermal efficiency of gas turbine cycle, it consist on using the exhaust gas of the turbine to preheat compressed air before entering the combustion chamber, so a thermodynamic and energy study for the cycle is established. Then a calculation code is developed using EES software in the purpose to analyze the influence of operating and geometry variables...
In this study, low temperature Organic Rankine Cycle (ORC) systems with single and two-stage turbine are proposed for the production of electricity. The refrigerant R-134a is selected as working fluid based on peak temperature of the cycle for solar and geothermal applications. The design criteria of ORC system is introduced and explained in detail. The radial inflow turbine is selected to satisfy...
Assignments of the vessels change suddenly sometimes, so the marine steam vessels need better thermoeconomic. Based on the thermodynamic calculation theory, thermodynamic calculation models of equipments in marine steam power plants are developed. Then, the thermoeconomic calculation model of marine steam power plants is established with index of fuel consumption of one nautical mile. Also utility...
This paper has made an exergy analysis of the performance of a 600 MW thermal power plant at specific load of 470 MW, and studied on the exergy loss and its distributing of each subsystem and equipment. The results show that the exergy loss of the whole system is about 1111.41MJ, and the exergy efficiency of the whole system is 30.75% or so. Additionally, we also found that the exergy loss of the...
Engineers will play a significant role in designing, building and implementing creative solutions to major global challenges that we face. To prepare the 21st century engineer, sustainability concepts needs to be covered systematically throughout the curriculum and in all majors of the engineering departments. This NSF-funded project is integrating fundamental concepts of sustainability into two core...
This paper aims at demonstrating the possible improvement of currently used control concepts for steam turbines. A model-based control is designed for a condensation turbine with steam extraction, which is used to drive a compressor on the chemical process side. The turbine is part of a sophisticated steam system of a chemical high-duty plant. Modeling of the steam system with the turbine leads to...
There is an apparent lack of micro-turbine dynamic models available in literature that include valid experimental data. In an effort to help fill this gap a thermodynamic based micro-turbine model supplemented with experimental data & validated calculations is introduced. The data was extracted from a study on the 60 kW Capstone C60 MicroTurbine™. Transfer functions describing the micro-turbine...
Assignments of the vessels change suddenly sometimes, so the vessels need several of operation plans on the marine steam power plant. Based on the thermodynamic calculation theory, maneuverability analysis model of steam-powered vessel is given with the maximum speed index for different operation plans of steam power plant. The result indicates that the maneuverability model is practical and efficient...
The governing equations of micro-turbine components were built on the basis of thermodynamic analysis with MATLAB/Simulink. Combining with the experimental data of micro-turbine, the sample from the manufacture and previous researches on the variable condition characteristics of gas turbine, a high computational efficiency micro-turbine thermodynamic model was developed, which is applicable for energy...
The mathematical model of the gas turbine performance in the condition of fault is established by using the exergy efficiency, which as a figure of merit of the work potential that based on the second law of thermodynamics. The performance matrix of fault model is derived by using the small deviation method. The exergy efficiency is contrasted with the efficiency, which is the traditional function...
This study examines the performance of a high-temperature solid oxide fuel cell combined with a conventional recuperative gas turbine (GT-SOFC) plant, as well as the irreversibility within the system. Individual models are developed for each component, based on the first and second laws of thermodynamics. The overall system performance is then analyzed by applying thermodynamic laws for the entire...
Refrigerant phase-change closed-Brayton-Cycle With Intercooling, Reheating and Regeneration Solar Thermal Power System are proposed. The refrigerant would deliver heat from the solar furnace at temperatures between 700°C and 850°C to a closed multireheat Bray-ton power cycle using NH3 as the working Fluid. Finite-time thermodynamics was applied to analyze the characteristic of...
With the utilisation of binary mixture as working fluid in a power generation cycle, higher heat conversion rate will be achieved in the boiler which results in more efficiency. In this paper two kalina cycle designs using binary mixtures as working fluid were compared, the cycle efficiency as a function of turbine inlet and separator outlet were calculated for the kalina cycles. The cycle's property...
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